title: Genetic variation in avian retroviruses.
authors.affiliation: Tufts University School of Medicine, Department of Molecular Biology and Microbiology, Boston, MA 02111.
authors.forename: J M
authors.initials: JM
authors.lastname: Coffin
mesh_terms: D000818:Animals; D001717:Birds; D004261:DNA Replication; D014644:Genetic Variation; D009154:Mutation; D012190:Retroviridae / Q000235:genetics* / Q000502:physiology; D014779:Virus Replication